Alternatively, other useful cationic surfactants include amino-amides, wherein in the above structure R1 is alternatively R5CO???(CH2)n???, wherein R5 is an alkyl group having from about 12 to about 22 carbon atoms, and n is an integer from about 2 to about 6, more preferably from about 2 to about 4, and most preferably from about 2 to about 3.